Univariate analyses of potential risk factors for the occurrence of ankle injuries among dance students (total n=91 with number of legs=182)
| Dance student characteristics | Non-injured ankles (no of legs=161) | Injured ankles (no of legs=21) | Univariate analyses OR (95% CI) | P value |
| Age (year) (SD) | 19.2 (1.4) | 19.2 (2.3) | 1.03 (0.74 to 1.43) | 0.86 |
| Sex (male) | 42 (26.1%) | 12 (57.1%) | 0.27 (0.09 to 0.75) | 0.01 |
| BMI (kg/m2) (SD)* | 21.2 (2.0) | 21.4 (1.4) | 1.05 (0.86 to 1.29) | 0.61 |
| Educational programme (BDE)† | 61 (37.9%) | 3 (14.3%) | 0.27 (0.08 to 0.97) | 0.045 |
| Long-lasting ankle injury in the past year | 4 (2.5%) | 0 (0.0%) | n.a. | n.a. |
| Ankle range of motion (abnormal)‡ | 26 (16.1) | 2 (9.5) | 0.69 (0.14 to 3.38) | 0.65 |
| Ankle dorsal flexion (wall to toe distance in centimetres) (SD)§¶† | 14.5 (2.6) | 15.3 (3.0) | 1.10 (0.91 to 1.34) | 0.34 |
Presented in n (%), unless otherwise stated.
*Missing data from four dance students (eight legs).
†Reference category is the educational programme bachelors in dance.
‡Range of motion dichotomised into normal and abnormal (hypermobile and hypomobile range of motion), with a normal range of motion as the reference category.
§Measured with the weight-bearing lunge test.
¶Missing data from 4 dance students (8 legs).
BDE, bachelors in dance education; BMI, body mass index; ; n.a., not available.